(19)
(11) EP 4 278 735 A1

(12)

(43) Date of publication:
22.11.2023 Bulletin 2023/47

(21) Application number: 22703743.9

(22) Date of filing: 12.01.2022
(51) International Patent Classification (IPC): 
H04W 56/00(2009.01)
(52) Cooperative Patent Classification (CPC):
H04W 56/0045; Y02D 30/70
(86) International application number:
PCT/US2022/012075
(87) International publication number:
WO 2022/155170 (21.07.2022 Gazette 2022/29)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 12.01.2021 US 202163136531 P

(71) Applicant: InterDigital Patent Holdings, Inc.
Wilmington, DE 19809 (US)

(72) Inventors:
  • TEYEB, Oumer
    Montreal, Québec H3A 3G4 (CA)
  • FREDA, Martino
    Montreal, Québec H3A 3G4 (CA)
  • DEENOO, Yugeswar
    Conshohocken, Pennsylvania 19428 (US)
  • COMSA, Virgil
    Montreal, Québec H3A 3G4 (CA)

(74) Representative: AWA Sweden AB 
Box 5117
200 71 Malmö
200 71 Malmö (SE)

   


(54) METHODS AND SYSTEMS FOR EFFICIENT UPLINK (UL) SYNCHRONIZATION MAINTENANCE WITH A DEACTIVATED SECONDARY CELL GROUP (SCG)